US20230032985A1 - Display device - Google Patents
Display device Download PDFInfo
- Publication number
- US20230032985A1 US20230032985A1 US17/789,341 US202017789341A US2023032985A1 US 20230032985 A1 US20230032985 A1 US 20230032985A1 US 202017789341 A US202017789341 A US 202017789341A US 2023032985 A1 US2023032985 A1 US 2023032985A1
- Authority
- US
- United States
- Prior art keywords
- display device
- section
- electrode
- particles
- protrusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002245 particle Substances 0.000 claims abstract description 80
- 230000002787 reinforcement Effects 0.000 claims abstract description 62
- 238000004220 aggregation Methods 0.000 claims abstract description 55
- 230000002776 aggregation Effects 0.000 claims abstract description 55
- 230000004308 accommodation Effects 0.000 claims abstract description 44
- 239000002612 dispersion medium Substances 0.000 claims abstract description 28
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 claims description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 229920002545 silicone oil Polymers 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000011159 matrix material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BKIMMITUMNQMOS-UHFFFAOYSA-N nonane Chemical compound CCCCCCCCC BKIMMITUMNQMOS-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KFYRPLNVJVHZGT-UHFFFAOYSA-N Amitriptyline hydrochloride Chemical compound Cl.C1CC2=CC=CC=C2C(=CCCN(C)C)C2=CC=CC=C21 KFYRPLNVJVHZGT-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- JAONJTDQXUSBGG-UHFFFAOYSA-N dialuminum;dizinc;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Zn+2].[Zn+2] JAONJTDQXUSBGG-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000002608 ionic liquid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 239000002096 quantum dot Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
- G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1656—Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
- H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel
Definitions
- the present invention relates to display devices.
- Patent Literature 1 describes a foldable display device.
- the display device described in Patent Literature 1 includes: a flexible display panel; a first housing that supports a first section of the flexible display panel; and a second housing that supports a second section of the flexible display panel.
- the flexible display panel includes a bending section between the first section and the second section.
- Patent Literature 1 Japanese Unexamined Patent Application Publication, Tokukai, No. 2015-64570
- the present disclosure has a primary object to provide a display device with excellent press resistance.
- the present invention in an aspect thereof, is directed to a display device including a display panel and a reinforcement body.
- the display panel includes in at least a part thereof a flexible section that is flexible.
- the reinforcement body is attached to the flexible section.
- the reinforcement body includes a reinforcement main body, a dispersion medium, a plurality of particles, and an aggregation section.
- the reinforcement main body has an accommodation space overlapping the flexible section.
- the reinforcement main body is flexible.
- the dispersion medium is contained in the accommodation space.
- the plurality of particles are dispersed in the dispersion medium.
- the aggregation section aggregates the plurality of particles so as to form an aggregation layer in the accommodation space.
- FIG. 1 is a schematic cross-sectional view of a display device in accordance with Embodiment 1.
- FIG. 2 is a schematic cross-sectional view of the display device in accordance with Embodiment 1.
- FIG. 3 is a schematic cross-sectional view of the portion encircled by dash-dot line III in FIG. 2 .
- FIG. 4 is a schematic plan view of a first main wall section in accordance with Embodiment 1.
- FIG. 5 is a schematic cross-sectional view of the display device in accordance with Embodiment 1 where an aggregation layer is formed.
- FIG. 6 is a schematic plan view of a first wall section and an aggregation layer in accordance with Embodiment 1 where the aggregation layer is formed.
- FIG. 7 is a schematic cross-sectional view of a display device in accordance with Embodiment 2.
- FIG. 8 is a schematic cross-sectional view of a display device in accordance with Embodiment 3.
- FIG. 9 is a schematic plan view of a protrusion in accordance with Embodiment 3, illustrating the shape of the protrusion as it appears in a plan view.
- FIG. 10 is a schematic cross-sectional view of a display device in accordance with Embodiment 4.
- FIG. 11 is a schematic plan view of a protrusion in accordance with Embodiment 5, illustrating the shape of the protrusion as it appears in a plan view.
- FIG. 12 is a schematic plan view of a protrusion in accordance with Embodiment 6, illustrating the shape of the protrusion as it appears in a plan view.
- FIG. 13 is a schematic plan view of a protrusion in accordance with Embodiment 7, illustrating the shape of the protrusion as it appears in a plan view.
- FIG. 1 is a schematic cross-sectional view of a display device 1 in accordance with Embodiment 1.
- FIG. 2 is a schematic cross-sectional view of the display device 1 in accordance with Embodiment 1.
- FIG. 3 is a schematic cross-sectional view of the portion encircled by dash-dot line II in FIG. 2 .
- the display device 1 includes a display panel 10 and a reinforcement body 20 .
- the display panel 10 is not limited in any particular manner so long as the display panel 10 is at least partially flexible.
- the display panel 10 may be, for example, a self-luminous display panel.
- the display panel 10 may be, for example, an OLED (organic light-emitting diode) display panel or a QLED (quantum dots light-emitting diode) display panel.
- the display panel 10 is preferably built around an OLED or QLED display panel in which a flexible section that is flexible can be easily formed.
- the backlight is preferably built around, for example, either one or both of an OLED and a QLED.
- the display panel 10 is at least partially flexible.
- the display panel 10 includes, in at least a part thereof, a flexible section 10 c that is flexible.
- the display panel 10 may be only partially constituted by the flexible section 10 c or may be entirely constituted by the flexible section 10 c .
- the present embodiment assumes, as an example, that the display panel 10 is substantially entirely constituted by the flexible section 10 c.
- the display panel 10 may have any shape in a plan view.
- the display panel 10 may be, for example, rectangular, polygonal, circular, elliptical, or elongated circular in a plan view.
- the present embodiment assumes, as an example, that the display panel 10 has a rectangular shape in a plan view.
- the display panel 10 may have a touch panel function.
- the reinforcement body 20 is attached to the display panel 10 as shown primarily in FIG. 1 . More specifically, the reinforcement body 20 is attached to the flexible section 10 c of the display panel 10 . The reinforcement body 20 is not necessarily attached to the entire flexible section 10 c . The reinforcement body 20 may be attached to, for example, a part of the flexible section 10 c . In other words, the reinforcement body 20 may not be attached to at least a part of the flexible section 10 c . Specifically, in the present embodiment, the reinforcement body 20 is attached to the substantially entire display panel 10 included in the flexible section 10 c.
- the reinforcement body 20 is disposed on a substantially entire second main face 10 b located opposite from a first main face 10 a that provides a light-exiting face for the display panel 10 .
- the reinforcement body 20 may be attached to the display panel 10 by any method.
- the reinforcement body 20 may be adhered to the second main face 10 b of the display panel 10 using, for example, adhesive or may be affixed directly to the second main face 10 b without using adhesive or like material.
- the reinforcement body 20 and the display panel 10 may be joined together by, for example, a plurality of fastening members.
- the present embodiment assumes, as an example, that the reinforcement body 20 is adhered to the substantially entire second main face 10 b by an adhesion layer.
- the reinforcement body 20 includes a reinforcement main body 21 , a dispersion medium 22 , a plurality of particles 23 , an aggregation section 24 , a power supply 25 , and a control section 26 .
- the reinforcement main body 21 is provided in at least a part of an area in which the flexible section 10 c is provided. Specifically, in the present embodiment, the reinforcement main body 21 is provided in a substantially entire area in which the flexible section 10 c is provided.
- the reinforcement main body 21 has an accommodation space 21 a .
- the accommodation space 21 a is provided so as to overlap at least a part of the flexible section 10 c .
- the accommodation space 21 a is provided so as to overlap the substantially entire flexible section 10 c.
- the reinforcement main body 21 includes a first main wall section 21 b , a second main wall section 21 c , and a sidewall section 21 d .
- the first main wall section 21 b is provided along the flexible section 10 c .
- the first main wall section 21 b and the second main wall section 21 c are positioned facing each other in the z-axis direction in which the display panel 10 and the reinforcement body 20 are stacked.
- the first main wall section 21 b and the second main wall section 21 c face each other with the accommodation space 21 a intervening therebetween.
- the first main wall section 21 b is disposed closer to the display panel 10 than is the second main wall section 21 c .
- first main wall section 21 b and the peripheral portion of the second main wall section 21 c are connected together by the sidewall section 21 d which is provided so as to surround the accommodation space 21 a .
- These first main wall section 21 b , second main wall section 21 c , and sidewall section 21 d delimit the accommodation space 21 a which is a closed space.
- first main wall section 21 b the second main wall section 21 c , and the sidewall section 21 d , at least the first main wall section 21 b and the second main wall section 21 c are flexible.
- the reinforcement main body 21 is therefore also flexible.
- the first main wall section 21 b , the second main wall section 21 c , and the sidewall section 21 d may be made of any substance.
- the first main wall section 21 b , the second main wall section 21 c , and the sidewall section 21 d may be each made of, for example, resin or metal.
- the first main wall section 21 b has a protrusion 21 B on a surface 21 b 1 thereof on a side of the accommodation space 21 a .
- the protrusion 21 B protrudes from the surface 21 b 1 toward the second main wall section 21 c .
- the protrusion 21 B extends in the z-axis direction.
- FIG. 3 is a schematic cross-sectional view of the portion encircled by dash-dot line III in FIG. 2 . Note that FIG. 3 omits the particles 23 .
- the protrusion 21 B has a height t 1 (dimension in the z-axis direction) that is preferably less than or equal to half of the thickness to (dimension in the z-axis direction) of the accommodation space 21 a (t 1 ⁇ (1 ⁇ 2) ⁇ t 0 ) when the flexible section 10 c is platelike and that is more preferably less than or equal to one third of that thickness to.
- the height t 1 of the protrusion 21 B is preferably greater than or equal to 10 times the average particle diameter of the particles 23 and more preferably greater than or equal to 30 times that average particle diameter.
- the protrusion 21 B does not necessarily have a rectangular lateral cross-sectional shape.
- the lateral cross-sectional shape of the protrusion 21 B may be, for example, trapezoidal, triangular, or domical.
- FIG. 4 is a schematic plan view of the surface 21 b 1 of the first main wall section 21 b in accordance with Embodiment 1.
- the protrusion 21 B is provided in such a manner as to divide a portion of the accommodation space 21 a on the side of the first main wall section 21 b into a plurality of regions A.
- the regions A are arranged both in the x-axis direction and in the w-axis direction, like a matrix.
- the x-axis direction is perpendicular to the z-axis direction.
- the w-axis direction is inclined to both the x-axis direction and the y-axis direction and is also perpendicular to the z-axis direction.
- the y-axis direction is perpendicular to both the x-axis direction and the z-axis direction.
- the regions A are arranged in the x-axis direction, the y-axis direction, and the w-axis direction.
- the present embodiment assumes, as an example, that there is provided one integrally formed protrusion 21 B. Note that the present invention is not necessarily limited to such a structure. There may be provided a plurality of protrusions in the present invention.
- the protrusion 21 B includes a plurality of first protrusions 21 B 1 extending in the x-axis direction. Each of the first protrusions 21 B 1 is arranged linearly. The first protrusions 21 B 1 are arranged in the y-axis direction in an equidistant manner.
- the protrusion 21 B further includes a plurality of second protrusions 21 B 2 .
- Each of the second protrusions 21 B 2 is arranged linearly in the y-axis direction.
- the plurality of second protrusions 21 B 2 interconnect two first protrusions 21 B 1 that are adjacent to each other in the y-axis direction and include the plurality of second protrusions 21 B 2 arranged in the x-axis direction.
- the second protrusion 21 B 2 that connects one first protrusion 21 B 1 to a first protrusion 21 B 1 positioned on a side of the one first protrusion 21 B 1 with respect to the y-axis direction is disposed in a different location with respect to the x-axis direction from the second protrusion 21 B 2 that connects one first protrusion 21 B 1 to a first protrusion 21 B 1 positioned on the other side of the one first protrusion 21 B 1 with respect to the y-axis direction.
- the dispersion medium 22 shown in FIG. 2 is contained inside the accommodation space 21 a .
- the dispersion medium 22 is a medium in which the particles 23 can be dispersed.
- the dispersion medium 22 is not limited in any particular manner so long as the dispersion medium 22 allows dispersion of the particles 23 .
- the dispersion medium 22 is preferably in liquid form.
- the dispersion medium 22 may include, for example, an aqueous or non-aqueous liquid.
- the dispersion medium 22 may be, for example, oil, water, an aqueous solution, alcohol, linear or cyclic saturated or unsaturated hydrocarbon, ether, or ionic liquid.
- dispersion medium 22 examples include silicone oil, water, ethanol, propanol, butanol, ethylene glycol, propylene glycol, pentane, hexane, heptane, octane, nonane, decane, dodecane, toluene, xylene, and THF. Any one of these materials may be used alone; alternatively, any two or more of them may be used in mixture.
- the accommodation space 21 a is preferably filled with the dispersion medium 22 .
- the accommodation space 21 a preferably contains substantially no gas therein.
- the particles 23 reside in the accommodation space 21 a .
- the particles 23 are dispersed in the dispersion medium 22 .
- the particles 23 are dispersed in the dispersion medium 22 when the aggregation section 24 is not driven.
- the particles 23 are not limited in any particular manner so long as the particles 23 can be aggregated by the aggregation section 24 (described later in detail).
- the particles 23 may be capable of being aggregated by, for example, receiving electric, magnetic, optical or thermal energy.
- the present embodiment assumes, as an example, that the particles 23 include a plurality of charged particles that can be aggregated under applied voltage. Note that an example of the particles 23 that can be aggregated in an applied magnetic field is magnetic particles.
- the particles 23 include, for example, at least one species of titanium oxide particles, carbon black particles, a complex of such particles coated with a polyethylene or like polymer, polyethylene particles, polystyrene particles, and silica particles.
- the particles 23 may include, for example, a single species of particles or a plurality of species (e.g., two species) of particles.
- the particles 23 may be either transparent or opaque.
- the particles 23 may have any shape and may be, for example, spherical, spheroidal, acicular, rod-like, angular columnar, cylindrical, platelike, or flake-like.
- the particles 23 may include a plurality of species of particles of different shapes.
- the average particle diameter of the particles 23 is, for example, preferably from 30 nm to 100 ⁇ m, more preferably from 100 nm to 20 ⁇ m, and even more preferably from 1 ⁇ m to 5 ⁇ m, all inclusive.
- the average particle diameter of the particles 23 can be measured using a particle size distribution measuring instrument.
- the concentration of the particles 23 in the dispersion medium 22 is preferably from 1 vol % to 30 vol % and more preferably from 3 vol % to 10 vol %, all inclusive.
- the aggregation section 24 aggregates the particles 23 .
- the aggregation section 24 is not limited in any particular manner so long as the aggregation section 24 can aggregate the particles 23 .
- the aggregation section 24 preferably applies voltage to the dispersion medium 22 in which the particles 23 are dispersed.
- the aggregation section 24 includes a first electrode 24 a and a second electrode 24 b .
- the first electrode 24 a and the second electrode 24 b face each other with the accommodation space 21 a intervening therebetween.
- the first electrode 24 a is disposed on a main face opposite from the accommodation space 21 a of the first main wall section 21 b of the reinforcement main body 21 .
- the second electrode 24 b is disposed on a main face opposite from the accommodation space 21 a of the second main wall section 21 c of the reinforcement main body 21 .
- each of the first electrode 24 a and the second electrode 24 b is provided in a substantially entire area in which the accommodation space 21 a is provided.
- both the first electrode 24 a and the second electrode 24 b may be made of any substance.
- Each of the first electrode 24 a and the second electrode 24 b may be made of, for example, a metal such as Al, Ag, Au, or Pt, an alloy containing at least one of these metals, or a transparent conductive oxide (TCO) such as indium tin oxide (ITO), aluminum zinc oxide (ZnO:Al (AZO)), indium zinc oxide (IZO), or In 2 O 3 -based IGO with a variable Ga content.
- TCO transparent conductive oxide
- the first electrode 24 a and the second electrode 24 b are connected to the power supply 25 .
- the power supply 25 applies voltage across the first electrode 24 a and the second electrode 24 b .
- the power supply 25 is built around a DC power supply to apply DC voltage across the first electrode 24 a and the second electrode 24 b.
- the control section 26 is connected to the power supply 25 .
- the control section 26 controls the voltage that the power supply 25 applies across the first electrode 24 a and the second electrode 24 b .
- the control section 26 controls turning-on/off of the voltage that the power supply 25 applies across the first electrode 24 a and the second electrode 24 b and also controls the value of the voltage applied across the first electrode 24 a and the second electrode 24 b .
- the control section 26 may be capable of, for example, switching between a state where the power supply 25 is applying no voltage across the first electrode 24 a and the second electrode 24 b and a state where the power supply 25 is applying a prescribed voltage (voltage higher than or equal to a voltage required for the particles 23 to aggregate to form the aggregation layer) across the first electrode 24 a and the second electrode 24 b .
- the control section 26 may enable the power supply 25 to apply different levels of voltage across the first electrode 24 a and the second electrode 24 b.
- the control section 26 may be capable of linearly controlling the voltage that the power supply 25 applies across the first electrode 24 a and the second electrode 24 b.
- the control section 26 may be built around, for example, a processor.
- the display device 1 When no voltage is being applied across the first electrode 24 a and the second electrode 24 b , the particles 23 are dispersed in the dispersion medium 22 in the accommodation space 21 a . Therefore, when no voltage is being applied across the first electrode 24 a and the second electrode 24 b , the display device 1 is flexible.
- FIG. 5 is a schematic cross-sectional view of the display device 1 in accordance with Embodiment 1 where an aggregation layer 23 a is formed.
- FIG. 6 is a schematic plan view of the first main wall section 21 b and the aggregation layer 23 a in accordance with Embodiment 1 where the aggregation layer 23 a is formed. Note that in FIG. 6 , the area where the aggregation layer 23 a is formed is shown in hatching for convenience of description. This hatched area does not represent a cross-section.
- the reinforcement body 20 is structured such that the aggregation layer 23 a formed by the aggregation section 24 can reinforce the flexible section 10 c .
- the display device 1 may lose some of the flexibility thereof, the display device 1 exhibits improved press resistance. Accordingly, the display device 1 has excellent press resistance.
- the reinforcement body 20 is preferably structured such that the aggregation layer 23 a is formed on the surface 21 b 1 of the first main wall section 21 b on the side of the accommodation space 21 a .
- the power supply 25 preferably applies such a voltage across the first electrode 24 a and the second electrode 24 b that the first electrode 24 a can act as an anode and the second electrode 26 can act as a cathode.
- the protrusion 21 B is preferably provided on the surface 21 b 1 of the first main wall section 21 b on the side of the accommodation space 21 a .
- the protrusion 21 B since the protrusion 21 B engages the aggregation layer 23 a , the aggregation layer 23 a can be restrained from being displaced relative to the surface 21 b 1 even if the display device 1 is placed under stress. Thus, even better press resistance can be achieved.
- the protrusion 21 B is more preferably provided such that the protrusion 21 B divides a portion of the accommodation space 21 a on the side of the first main wall section 21 b into the plurality of regions A.
- the height t 1 of the protrusion 21 B is preferably greater than or equal to 10 times the average particle diameter of the particles 23 and more preferably greater than or equal to 30 times that average particle diameter. In such a case, the rigidity of the aggregation layer 23 a can be increased, and for this reason, even better press resistance can be achieved. However, if the height t 1 of the protrusion 21 B is too high, the particles 23 may not be readily re-dispersed in the dispersion medium 22 when the voltage application across the first electrode 24 a and the second electrode 24 b is stopped. In other words, the reversibility between the dispersed particles 23 and the aggregation layer 23 a may be degraded.
- the height t 1 of the protrusion 21 B is preferably less than or equal to half of the thickness to of the accommodation space 21 a (t 1 ⁇ (1 ⁇ 2) ⁇ t 0 ) when the flexible section 10 c is platelike and more preferably less than or equal to one third of that thickness to.
- the location where the aggregation layer 23 a is formed with respect to the z-axis direction is not limited in any particular manner. With a view to further improving press resistance, however, the aggregation layer 23 a is preferably provided exactly on the surface 21 b 1 .
- the power supply 25 preferably applies voltage across the first electrode 24 a and the second electrode 24 b in such a manner that the particles 23 can move toward the first electrode 24 a under applied voltage, in order to form the aggregation layer 23 a exactly on the surface 21 b 1 .
- the particles 23 are preferably composed primarily of particles primarily of a highly rigid inorganic material.
- the rigidity of the aggregation layer 23 a hence the rigidity of the display device 1 , can be readily increased.
- the reinforcement body 20 is structured such that individual aggregation layers 23 a are formed in the respective regions A. Even in such a case, the press resistance of the display device 1 is improved if the aggregation layers 23 a are provided. With a view to more efficiently improving the press resistance, for example, as in a display device 1 a shown in FIG. 7 , the reinforcement body 20 is more preferably structured such that the aggregation layer 23 a has a larger thickness than the height t 1 of the protrusion 21 B and is provided across the regions A.
- the power supply 25 needs only to apply, across the first electrode 24 a and the second electrode 24 b , a sufficiently high voltage to aggregate the particles 23 , thereby forming the aggregation layer 23 a .
- the control section 26 can apply different levels of voltage across the first electrode 24 a and the second electrode 24 b , the rigidity of the aggregation layer 23 a can be adjusted by controlling the magnitude of the applied voltage. Therefore, the flexibility and press resistance of the display device 1 can be controlled.
- the control section 26 more preferably can linearly control the voltage applied across the first electrode 24 a and the second electrode 24 b.
- Press resistance is essential to any display device.
- the technology disclosed here is therefore suited to any type of display device. Higher levels of press resistance are often required in display devices that have a touch panel function. Accordingly, the technology disclosed here is particularly suited to display devices that have a touch panel function.
- FIG. 8 is a schematic cross-sectional view of a display device 1 b in accordance with Embodiment 3.
- the display device 1 b in accordance with Embodiment 3 differs from the display device 1 in accordance with Embodiment 1 and the display device 1 a in accordance with Embodiment 2 in that the display device 1 b further includes a support body 30 and that in the display device 1 b , the reinforcement body 20 is only provided in a part of the display panel 10 .
- the support body 30 is attached to a part of the display panel 10 .
- the support body 30 is adhered to a part of the display panel 10 .
- the support body 30 has greater rigidity than the display panel 10 .
- the support body 30 includes a rigid body. Therefore, the portion of the display panel 10 to which the support body 30 is attached is less flexible than the portion thereof to which the support body 30 is not attached. There can be practical cases where the portion of the display panel 10 to which the support body 30 is attached is substantially inflexible and the portion thereof to which the support body 30 is not attached is flexible.
- the support body 30 may include, for example, a metal plate, a glass plate, a resin plate, or a ceramic plate.
- the support body 30 includes a first support body 31 and a second support body 32 .
- the first support body 31 and the second support body 32 are arranged in the x-axis direction and separated from each other by a distance.
- the first support body 31 is attached to the display panel 10 on one side of the reinforcement body 20 with respect to the x-axis direction.
- the second support body 32 is attached to the display panel 10 on the other side of the reinforcement body 20 with respect to the x-axis direction.
- the reinforcement body 20 is attached to a portion of the display panel 10 that is located between the portion of the display panel 10 to which the first support body 31 is attached and the portion of the display panel 10 to which the second support body 32 is attached.
- Both one side of the display device 1 b with respect to the x-axis direction and the other side thereof are substantially inflexible, and the portion of the display device 1 b in which the reinforcement body 20 is provided, in other words, the central portion of the display device 1 b with respect to the x-axis direction, is flexible.
- the reinforcement body 20 is not necessarily provided across the entire display panel 10 and may be provided in a part of the display panel, as in the present embodiment. This provision of the reinforcement body 20 in at least a part of the flexible portion of the display panel 10 enables improving the press resistance of the area in which the reinforcement body 20 is provided.
- FIG. 9 is a schematic plan view of a protrusion 21 B in accordance with Embodiment 3, illustrating the shape of the protrusion 21 B as it appears in a plan view.
- the protrusion 21 B preferably includes a plurality of first protrusions 21 B 1 reaching one end portion of the accommodation space 21 a from the other end portion thereof with respect to the y-axis direction which is perpendicular to the x-axis direction.
- the provision of these first protrusions 21 B 1 enables efficiently restraining the aggregation layer 23 a and the surface 21 b 1 from being displaced relative to each other. Therefore, press resistance can be more efficiently restrained.
- the protrusion 21 B further includes a plurality of second protrusions 21 B 2 interconnecting those of the first protrusions 21 B 1 that are adjacent to each other in the x-axis direction and that those of the second protrusions 21 B 2 that are adjacent to each other in the x-axis direction are disposed in different locations with respect to the y-axis direction.
- FIG. 10 is a schematic cross-sectional view of a display device 1 c in accordance with Embodiment 4.
- Embodiment 3 has discussed an example where the display device 1 b includes two support bodies 31 and 32 .
- the present invention is however not limited to this structure.
- the display device may include one support body, two support bodies, or three or more support bodies.
- the display device 1 c in accordance with Embodiment 4 includes three support bodies 31 , 32 , and 33 . Even when this is the case, the reinforcement body 20 is provided in at least a part of the portion of the display panel 10 in which none of the support bodies 31 , 32 , and 33 are provided. Accordingly, the display device 1 c can have excellent press resistance.
- FIG. 11 is a schematic plan view of a protrusion 21 B in accordance with Embodiment 5, illustrating the shape of the protrusion 21 B as it appears in a plan view.
- FIG. 12 is a schematic plan view of a protrusion 21 B in accordance with Embodiment 6, illustrating the shape of the protrusion 21 B as it appears in a plan view.
- FIG. 13 is a schematic plan view of a protrusion 21 B in accordance with Embodiment 7, illustrating the shape of the protrusion 21 B as it appears in a plan view.
- the aforementioned embodiments have discussed one exemplary shape of protrusions.
- the protrusions do not necessarily have the shape described in the aforementioned embodiments.
- the protrusion 21 B may be arranged, for example, in a lattice.
- the protrusion 21 B includes: a plurality of first protrusions 21 B 1 extending in the y-axis direction and arranged in the x-axis direction in an equidistant manner; and a plurality of second extending in the x-axis direction and arranged in the y-axis direction in an equidistant manner.
- the first protrusions 21 B 1 intersect with the second protrusions 21 B 2 .
- regions A are rectangular in the embodiment shown in FIG. 11 , but may be, for example, hexagonal or otherwise polygonal, circular, elliptical, or elongated circular.
- the protrusion 21 B may be arranged, for example, in an oblique lattice.
- the protrusion 21 B includes a plurality of first protrusions 21 B 1 and a plurality of second protrusions 21 B 2 that are inclined to the x-axis direction and the y-axis direction respectively.
- the first protrusions 21 B 1 intersect with the second protrusions 21 B 2 (typically, at 90 degrees).
- the protrusion 21 B includes a matrix of dot-like protrusions 21 B 3 .
- the protrusions 21 B 3 are arranged in an oblique matrix, but may be arranged in an upright matrix.
- the provision of the protrusion 21 B enables improving the press resistance of the display device.
- the aforementioned embodiments have discussed examples where the aggregation layer 23 a is formed when voltage is applied across the first electrode 24 a and the second electrode 24 b , and the particles 23 are dispersed when no voltage is applied.
- the aggregation section 24 aggregates the particles 23 when the accommodation space 21 a is under applied voltage.
- the particles 23 may be aggregated by any method.
- a plurality of particles 23 that are aggregated in a magnetic field may be dispersed in the dispersion medium 22 , and the aggregation section 24 may include a member that applies a magnetic field to the accommodation space 21 a (e.g., a coil).
- the particles 23 are preferably composed primarily of, for example, magnetic particles such as iron particles.
- the surface 21 b 1 of the first main wall section 21 b may be irregular. When this is the case, anchoring effect is enhanced between the surface 21 b 1 and the aggregation layer 23 a . That in turn enables further improving press resistance.
- the protrusion 21 B is provided on the surface 21 b 1 of the first main wall section 21 b on the side of the accommodation space 21 a .
- the protrusion is not necessarily provided. In the present invention, no protrusion needs to be formed on the surface of the first main wall section on the side of the accommodation space.
Abstract
A display device includes a display panel and a reinforcement body. The display panel includes in at least a part thereof a flexible section that is flexible. The reinforcement body is attached to the flexible section. The reinforcement body includes a reinforcement main body, a dispersion medium, a plurality of particles, and an aggregation section. The reinforcement main body has an accommodation space overlapping the flexible section. The reinforcement main body is flexible. The dispersion medium is contained in the accommodation space. The plurality of particles are dispersed in the dispersion medium. The aggregation section aggregates the plurality of particles so as to form an aggregation layer in the accommodation space.
Description
- The present invention relates to display devices.
-
Patent Literature 1, as an example, describes a foldable display device. The display device described inPatent Literature 1 includes: a flexible display panel; a first housing that supports a first section of the flexible display panel; and a second housing that supports a second section of the flexible display panel. The flexible display panel includes a bending section between the first section and the second section. - Patent Literature 1: Japanese Unexamined Patent Application Publication, Tokukai, No. 2015-64570
- There is a demand that the bending section of the display device described in
Patent Literature 1 have improved resistance under pressing force (hereinafter, may be referred to as “press resistance”). - The present disclosure has a primary object to provide a display device with excellent press resistance.
- The present invention, in an aspect thereof, is directed to a display device including a display panel and a reinforcement body. The display panel includes in at least a part thereof a flexible section that is flexible. The reinforcement body is attached to the flexible section. The reinforcement body includes a reinforcement main body, a dispersion medium, a plurality of particles, and an aggregation section. The reinforcement main body has an accommodation space overlapping the flexible section. The reinforcement main body is flexible. The dispersion medium is contained in the accommodation space. The plurality of particles are dispersed in the dispersion medium. The aggregation section aggregates the plurality of particles so as to form an aggregation layer in the accommodation space.
-
FIG. 1 is a schematic cross-sectional view of a display device in accordance withEmbodiment 1. -
FIG. 2 is a schematic cross-sectional view of the display device in accordance withEmbodiment 1. -
FIG. 3 is a schematic cross-sectional view of the portion encircled by dash-dot line III inFIG. 2 . -
FIG. 4 is a schematic plan view of a first main wall section in accordance withEmbodiment 1. -
FIG. 5 is a schematic cross-sectional view of the display device in accordance withEmbodiment 1 where an aggregation layer is formed. -
FIG. 6 is a schematic plan view of a first wall section and an aggregation layer in accordance withEmbodiment 1 where the aggregation layer is formed. -
FIG. 7 is a schematic cross-sectional view of a display device in accordance withEmbodiment 2. -
FIG. 8 is a schematic cross-sectional view of a display device in accordance with Embodiment 3. -
FIG. 9 is a schematic plan view of a protrusion in accordance with Embodiment 3, illustrating the shape of the protrusion as it appears in a plan view. -
FIG. 10 is a schematic cross-sectional view of a display device in accordance with Embodiment 4. -
FIG. 11 is a schematic plan view of a protrusion in accordance with Embodiment 5, illustrating the shape of the protrusion as it appears in a plan view. -
FIG. 12 is a schematic plan view of a protrusion in accordance with Embodiment 6, illustrating the shape of the protrusion as it appears in a plan view. -
FIG. 13 is a schematic plan view of a protrusion in accordance with Embodiment 7, illustrating the shape of the protrusion as it appears in a plan view. - The following will describe an example of a preferred mode for carrying out the present invention. Note however that the following embodiments are for illustrative purposes only. The present invention is not limited at all by the embodiments.
-
FIG. 1 is a schematic cross-sectional view of adisplay device 1 in accordance withEmbodiment 1.FIG. 2 is a schematic cross-sectional view of thedisplay device 1 in accordance withEmbodiment 1.FIG. 3 is a schematic cross-sectional view of the portion encircled by dash-dot line II inFIG. 2 . - Referring to
FIGS. 1 and 2 , thedisplay device 1 includes adisplay panel 10 and areinforcement body 20. - The
display panel 10 is not limited in any particular manner so long as thedisplay panel 10 is at least partially flexible. Thedisplay panel 10 may be, for example, a self-luminous display panel. Specifically, thedisplay panel 10 may be, for example, an OLED (organic light-emitting diode) display panel or a QLED (quantum dots light-emitting diode) display panel. Among these examples, thedisplay panel 10 is preferably built around an OLED or QLED display panel in which a flexible section that is flexible can be easily formed. When thedisplay panel 10 is a display panel equipped with a backlight, the backlight is preferably built around, for example, either one or both of an OLED and a QLED. - The
display panel 10 is at least partially flexible. In other words, thedisplay panel 10 includes, in at least a part thereof, aflexible section 10 c that is flexible. Thedisplay panel 10 may be only partially constituted by theflexible section 10 c or may be entirely constituted by theflexible section 10 c. Throughout the following description, the present embodiment assumes, as an example, that thedisplay panel 10 is substantially entirely constituted by theflexible section 10 c. - The
display panel 10 may have any shape in a plan view. Thedisplay panel 10 may be, for example, rectangular, polygonal, circular, elliptical, or elongated circular in a plan view. Throughout the following description, the present embodiment assumes, as an example, that thedisplay panel 10 has a rectangular shape in a plan view. - The
display panel 10 may have a touch panel function. - The
reinforcement body 20 is attached to thedisplay panel 10 as shown primarily inFIG. 1 . More specifically, thereinforcement body 20 is attached to theflexible section 10 c of thedisplay panel 10. Thereinforcement body 20 is not necessarily attached to the entireflexible section 10 c. Thereinforcement body 20 may be attached to, for example, a part of theflexible section 10 c. In other words, thereinforcement body 20 may not be attached to at least a part of theflexible section 10 c. Specifically, in the present embodiment, thereinforcement body 20 is attached to the substantiallyentire display panel 10 included in theflexible section 10 c. - More specifically, the
reinforcement body 20 is disposed on a substantially entire secondmain face 10 b located opposite from a firstmain face 10 a that provides a light-exiting face for thedisplay panel 10. - The
reinforcement body 20 may be attached to thedisplay panel 10 by any method. As an example, thereinforcement body 20 may be adhered to the secondmain face 10 b of thedisplay panel 10 using, for example, adhesive or may be affixed directly to the secondmain face 10 b without using adhesive or like material. As another alternative, thereinforcement body 20 and thedisplay panel 10 may be joined together by, for example, a plurality of fastening members. Throughout the following description, the present embodiment assumes, as an example, that thereinforcement body 20 is adhered to the substantially entire secondmain face 10 b by an adhesion layer. - A detailed description is given next of a specific structure of the reinforcement body primarily with reference to
FIG. 2 . - The
reinforcement body 20 includes a reinforcementmain body 21, adispersion medium 22, a plurality ofparticles 23, anaggregation section 24, apower supply 25, and acontrol section 26. - The reinforcement
main body 21 is provided in at least a part of an area in which theflexible section 10 c is provided. Specifically, in the present embodiment, the reinforcementmain body 21 is provided in a substantially entire area in which theflexible section 10 c is provided. - The reinforcement
main body 21 has anaccommodation space 21 a. Theaccommodation space 21 a is provided so as to overlap at least a part of theflexible section 10 c. Specifically, in the present embodiment, theaccommodation space 21 a is provided so as to overlap the substantially entireflexible section 10 c. - To describe it in detail, the reinforcement
main body 21 includes a firstmain wall section 21 b, a secondmain wall section 21 c, and asidewall section 21 d. The firstmain wall section 21 b is provided along theflexible section 10 c. The firstmain wall section 21 b and the secondmain wall section 21 c are positioned facing each other in the z-axis direction in which thedisplay panel 10 and thereinforcement body 20 are stacked. The firstmain wall section 21 b and the secondmain wall section 21 c face each other with theaccommodation space 21 a intervening therebetween. The firstmain wall section 21 b is disposed closer to thedisplay panel 10 than is the secondmain wall section 21 c. The peripheral portion of the firstmain wall section 21 b and the peripheral portion of the secondmain wall section 21 c are connected together by thesidewall section 21 d which is provided so as to surround theaccommodation space 21 a. These firstmain wall section 21 b, secondmain wall section 21 c, andsidewall section 21 d delimit theaccommodation space 21 a which is a closed space. - Of the first
main wall section 21 b, the secondmain wall section 21 c, and thesidewall section 21 d, at least the firstmain wall section 21 b and the secondmain wall section 21 c are flexible. The reinforcementmain body 21 is therefore also flexible. - The first
main wall section 21 b, the secondmain wall section 21 c, and thesidewall section 21 d may be made of any substance. The firstmain wall section 21 b, the secondmain wall section 21 c, and thesidewall section 21 d may be each made of, for example, resin or metal. - The first
main wall section 21 b has aprotrusion 21B on asurface 21b 1 thereof on a side of theaccommodation space 21 a. Theprotrusion 21B protrudes from thesurface 21b 1 toward the secondmain wall section 21 c. Theprotrusion 21B extends in the z-axis direction. -
FIG. 3 is a schematic cross-sectional view of the portion encircled by dash-dot line III inFIG. 2 . Note thatFIG. 3 omits theparticles 23. - The
protrusion 21B has a height t1 (dimension in the z-axis direction) that is preferably less than or equal to half of the thickness to (dimension in the z-axis direction) of theaccommodation space 21 a (t1≤(½)·t0) when theflexible section 10 c is platelike and that is more preferably less than or equal to one third of that thickness to. The height t1 of theprotrusion 21B is preferably greater than or equal to 10 times the average particle diameter of theparticles 23 and more preferably greater than or equal to 30 times that average particle diameter. - Note that the
protrusion 21B does not necessarily have a rectangular lateral cross-sectional shape. The lateral cross-sectional shape of theprotrusion 21B may be, for example, trapezoidal, triangular, or domical. -
FIG. 4 is a schematic plan view of thesurface 21b 1 of the firstmain wall section 21 b in accordance withEmbodiment 1. Referring toFIGS. 2 to 4 , theprotrusion 21B is provided in such a manner as to divide a portion of theaccommodation space 21 a on the side of the firstmain wall section 21 b into a plurality of regions A. - Referring to
FIG. 4 , the regions A are arranged both in the x-axis direction and in the w-axis direction, like a matrix. The x-axis direction is perpendicular to the z-axis direction. The w-axis direction is inclined to both the x-axis direction and the y-axis direction and is also perpendicular to the z-axis direction. The y-axis direction is perpendicular to both the x-axis direction and the z-axis direction. In the present embodiment, the regions A are arranged in the x-axis direction, the y-axis direction, and the w-axis direction. - The present embodiment assumes, as an example, that there is provided one integrally formed
protrusion 21B. Note that the present invention is not necessarily limited to such a structure. There may be provided a plurality of protrusions in the present invention. - The
protrusion 21B includes a plurality of first protrusions 21B1 extending in the x-axis direction. Each of the first protrusions 21B1 is arranged linearly. The first protrusions 21B1 are arranged in the y-axis direction in an equidistant manner. - The
protrusion 21B further includes a plurality of second protrusions 21B2. Each of the second protrusions 21B2 is arranged linearly in the y-axis direction. The plurality of second protrusions 21B2 interconnect two first protrusions 21B1 that are adjacent to each other in the y-axis direction and include the plurality of second protrusions 21B2 arranged in the x-axis direction. The second protrusion 21B2 that connects one first protrusion 21B1 to a first protrusion 21B1 positioned on a side of the one first protrusion 21B1 with respect to the y-axis direction is disposed in a different location with respect to the x-axis direction from the second protrusion 21B2 that connects one first protrusion 21B1 to a first protrusion 21B1 positioned on the other side of the one first protrusion 21B1 with respect to the y-axis direction. - The
dispersion medium 22 shown inFIG. 2 is contained inside theaccommodation space 21 a. Thedispersion medium 22 is a medium in which theparticles 23 can be dispersed. Thedispersion medium 22 is not limited in any particular manner so long as thedispersion medium 22 allows dispersion of theparticles 23. Thedispersion medium 22 is preferably in liquid form. Thedispersion medium 22 may include, for example, an aqueous or non-aqueous liquid. Specifically, thedispersion medium 22 may be, for example, oil, water, an aqueous solution, alcohol, linear or cyclic saturated or unsaturated hydrocarbon, ether, or ionic liquid. Specific examples thedispersion medium 22 include silicone oil, water, ethanol, propanol, butanol, ethylene glycol, propylene glycol, pentane, hexane, heptane, octane, nonane, decane, dodecane, toluene, xylene, and THF. Any one of these materials may be used alone; alternatively, any two or more of them may be used in mixture. - Note that the
accommodation space 21 a is preferably filled with thedispersion medium 22. In other words, theaccommodation space 21 a preferably contains substantially no gas therein. - The
particles 23 reside in theaccommodation space 21 a. Theparticles 23 are dispersed in thedispersion medium 22. To describe it in detail, theparticles 23 are dispersed in thedispersion medium 22 when theaggregation section 24 is not driven. - The
particles 23 are not limited in any particular manner so long as theparticles 23 can be aggregated by the aggregation section 24 (described later in detail). Theparticles 23 may be capable of being aggregated by, for example, receiving electric, magnetic, optical or thermal energy. Throughout the following description, the present embodiment assumes, as an example, that theparticles 23 include a plurality of charged particles that can be aggregated under applied voltage. Note that an example of theparticles 23 that can be aggregated in an applied magnetic field is magnetic particles. - Specifically, in the present embodiment, the
particles 23 include, for example, at least one species of titanium oxide particles, carbon black particles, a complex of such particles coated with a polyethylene or like polymer, polyethylene particles, polystyrene particles, and silica particles. Theparticles 23 may include, for example, a single species of particles or a plurality of species (e.g., two species) of particles. Theparticles 23 may be either transparent or opaque. - The
particles 23 may have any shape and may be, for example, spherical, spheroidal, acicular, rod-like, angular columnar, cylindrical, platelike, or flake-like. Theparticles 23 may include a plurality of species of particles of different shapes. - The average particle diameter of the
particles 23 is, for example, preferably from 30 nm to 100 μm, more preferably from 100 nm to 20 μm, and even more preferably from 1 μm to 5 μm, all inclusive. - Note that the average particle diameter of the
particles 23 can be measured using a particle size distribution measuring instrument. - The concentration of the
particles 23 in thedispersion medium 22 is preferably from 1 vol % to 30 vol % and more preferably from 3 vol % to 10 vol %, all inclusive. - The
aggregation section 24 aggregates theparticles 23. Theaggregation section 24 is not limited in any particular manner so long as theaggregation section 24 can aggregate theparticles 23. For instance, when theparticles 23 are charged particles, theaggregation section 24 preferably applies voltage to thedispersion medium 22 in which theparticles 23 are dispersed. - In the present embodiment, specifically, the
aggregation section 24 includes afirst electrode 24 a and asecond electrode 24 b. Thefirst electrode 24 a and thesecond electrode 24 b face each other with theaccommodation space 21 a intervening therebetween. Thefirst electrode 24 a is disposed on a main face opposite from theaccommodation space 21 a of the firstmain wall section 21 b of the reinforcementmain body 21. Thesecond electrode 24 b is disposed on a main face opposite from theaccommodation space 21 a of the secondmain wall section 21 c of the reinforcementmain body 21. In the present embodiment, each of thefirst electrode 24 a and thesecond electrode 24 b is provided in a substantially entire area in which theaccommodation space 21 a is provided. - Note that both the
first electrode 24 a and thesecond electrode 24 b may be made of any substance. Each of thefirst electrode 24 a and thesecond electrode 24 b may be made of, for example, a metal such as Al, Ag, Au, or Pt, an alloy containing at least one of these metals, or a transparent conductive oxide (TCO) such as indium tin oxide (ITO), aluminum zinc oxide (ZnO:Al (AZO)), indium zinc oxide (IZO), or In2O3-based IGO with a variable Ga content. - The
first electrode 24 a and thesecond electrode 24 b are connected to thepower supply 25. Thepower supply 25 applies voltage across thefirst electrode 24 a and thesecond electrode 24 b. In the present embodiment, thepower supply 25 is built around a DC power supply to apply DC voltage across thefirst electrode 24 a and thesecond electrode 24 b. - The
control section 26 is connected to thepower supply 25. Thecontrol section 26 controls the voltage that thepower supply 25 applies across thefirst electrode 24 a and thesecond electrode 24 b. In the present embodiment, specifically, thecontrol section 26 controls turning-on/off of the voltage that thepower supply 25 applies across thefirst electrode 24 a and thesecond electrode 24 b and also controls the value of the voltage applied across thefirst electrode 24 a and thesecond electrode 24 b. Thecontrol section 26 may be capable of, for example, switching between a state where thepower supply 25 is applying no voltage across thefirst electrode 24 a and thesecond electrode 24 b and a state where thepower supply 25 is applying a prescribed voltage (voltage higher than or equal to a voltage required for theparticles 23 to aggregate to form the aggregation layer) across thefirst electrode 24 a and thesecond electrode 24 b. In addition, thecontrol section 26 may enable thepower supply 25 to apply different levels of voltage across thefirst electrode 24 a and thesecond electrode 24 b. - The
control section 26 may be capable of linearly controlling the voltage that thepower supply 25 applies across thefirst electrode 24 a and thesecond electrode 24 b. - The
control section 26 may be built around, for example, a processor. - A detailed description is given next of the
display device 1 where no voltage is being applied across thefirst electrode 24 a and thesecond electrode 24 b and thedisplay device 1 where a voltage is being applied across thefirst electrode 24 a and thesecond electrode 24 b. -
Display Device 1 where No Voltage is being Applied AcrossFirst Electrode 24 a andSecond Electrode 24 b - When no voltage is being applied across the
first electrode 24 a and thesecond electrode 24 b, theparticles 23 are dispersed in thedispersion medium 22 in theaccommodation space 21 a. Therefore, when no voltage is being applied across thefirst electrode 24 a and thesecond electrode 24 b, thedisplay device 1 is flexible. -
Display Device 1 where Voltage is being Applied AcrossFirst Electrode 24 a andSecond Electrode 24 b -
FIG. 5 is a schematic cross-sectional view of thedisplay device 1 in accordance withEmbodiment 1 where anaggregation layer 23 a is formed.FIG. 6 is a schematic plan view of the firstmain wall section 21 b and theaggregation layer 23 a in accordance withEmbodiment 1 where theaggregation layer 23 a is formed. Note that inFIG. 6 , the area where theaggregation layer 23 a is formed is shown in hatching for convenience of description. This hatched area does not represent a cross-section. - Referring to
FIG. 5 , as a voltage is applied across thefirst electrode 24 a and thesecond electrode 24 b, theparticles 23 are aggregated to form theaggregation layer 23 a inside theaccommodation space 21 a. Therefore, theaggregation layer 23 a improves the rigidity of thedisplay device 1. In the present embodiment, thereinforcement body 20 is structured such that theaggregation layer 23 a formed by theaggregation section 24 can reinforce theflexible section 10 c. Thus, although thedisplay device 1 may lose some of the flexibility thereof, thedisplay device 1 exhibits improved press resistance. Accordingly, thedisplay device 1 has excellent press resistance. - With a view to further improving press resistance, the
reinforcement body 20 is preferably structured such that theaggregation layer 23 a is formed on thesurface 21b 1 of the firstmain wall section 21 b on the side of theaccommodation space 21 a. Specifically, when theparticles 23 include titanium oxide particles or a complex containing titanium oxide particles coated with a polymer, thepower supply 25 preferably applies such a voltage across thefirst electrode 24 a and thesecond electrode 24 b that thefirst electrode 24 a can act as an anode and thesecond electrode 26 can act as a cathode. - With a view to even further improving press resistance, the
protrusion 21B is preferably provided on thesurface 21b 1 of the firstmain wall section 21 b on the side of theaccommodation space 21 a. When theprotrusion 21B is provided, since theprotrusion 21B engages theaggregation layer 23 a, theaggregation layer 23 a can be restrained from being displaced relative to thesurface 21b 1 even if thedisplay device 1 is placed under stress. Thus, even better press resistance can be achieved. - With a view to still further improving press resistance, the
protrusion 21B is more preferably provided such that theprotrusion 21B divides a portion of theaccommodation space 21 a on the side of the firstmain wall section 21 b into the plurality of regions A. - The height t1 of the
protrusion 21B is preferably greater than or equal to 10 times the average particle diameter of theparticles 23 and more preferably greater than or equal to 30 times that average particle diameter. In such a case, the rigidity of theaggregation layer 23 a can be increased, and for this reason, even better press resistance can be achieved. However, if the height t1 of theprotrusion 21B is too high, theparticles 23 may not be readily re-dispersed in thedispersion medium 22 when the voltage application across thefirst electrode 24 a and thesecond electrode 24 b is stopped. In other words, the reversibility between the dispersedparticles 23 and theaggregation layer 23 a may be degraded. Therefore, the height t1 of theprotrusion 21B is preferably less than or equal to half of the thickness to of theaccommodation space 21 a (t1≤(½)·t0) when theflexible section 10 c is platelike and more preferably less than or equal to one third of that thickness to. - The location where the
aggregation layer 23 a is formed with respect to the z-axis direction is not limited in any particular manner. With a view to further improving press resistance, however, theaggregation layer 23 a is preferably provided exactly on thesurface 21b 1. For instance, thepower supply 25 preferably applies voltage across thefirst electrode 24 a and thesecond electrode 24 b in such a manner that theparticles 23 can move toward thefirst electrode 24 a under applied voltage, in order to form theaggregation layer 23 a exactly on thesurface 21b 1. - With a view to still further improving press resistance, the
particles 23 are preferably composed primarily of particles primarily of a highly rigid inorganic material. In such a case, the rigidity of theaggregation layer 23 a, hence the rigidity of thedisplay device 1, can be readily increased. - Note that as shown in
FIGS. 5 and 6 , in the present embodiment, thereinforcement body 20 is structured such that individual aggregation layers 23 a are formed in the respective regions A. Even in such a case, the press resistance of thedisplay device 1 is improved if the aggregation layers 23 a are provided. With a view to more efficiently improving the press resistance, for example, as in adisplay device 1 a shown inFIG. 7 , thereinforcement body 20 is more preferably structured such that theaggregation layer 23 a has a larger thickness than the height t1 of theprotrusion 21B and is provided across the regions A. - With a view to achieving excellent press resistance, under the control of the
control section 26, thepower supply 25 needs only to apply, across thefirst electrode 24 a and thesecond electrode 24 b, a sufficiently high voltage to aggregate theparticles 23, thereby forming theaggregation layer 23 a. For instance, when thecontrol section 26 can apply different levels of voltage across thefirst electrode 24 a and thesecond electrode 24 b, the rigidity of theaggregation layer 23 a can be adjusted by controlling the magnitude of the applied voltage. Therefore, the flexibility and press resistance of thedisplay device 1 can be controlled. With a view to enabling rigorous control of the flexibility and press resistance of thedisplay device 1, thecontrol section 26 more preferably can linearly control the voltage applied across thefirst electrode 24 a and thesecond electrode 24 b. - Press resistance is essential to any display device. The technology disclosed here is therefore suited to any type of display device. Higher levels of press resistance are often required in display devices that have a touch panel function. Accordingly, the technology disclosed here is particularly suited to display devices that have a touch panel function.
- The following will describe other modes for carrying out the present invention. Throughout the following description, the members that have substantially the same function as those in
Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted. -
FIG. 8 is a schematic cross-sectional view of adisplay device 1 b in accordance with Embodiment 3. - Referring to
FIG. 8 , thedisplay device 1 b in accordance with Embodiment 3 differs from thedisplay device 1 in accordance withEmbodiment 1 and thedisplay device 1 a in accordance withEmbodiment 2 in that thedisplay device 1 b further includes asupport body 30 and that in thedisplay device 1 b, thereinforcement body 20 is only provided in a part of thedisplay panel 10. - The
support body 30 is attached to a part of thedisplay panel 10. To describe it in detail, thesupport body 30 is adhered to a part of thedisplay panel 10. Thesupport body 30 has greater rigidity than thedisplay panel 10. Specifically, thesupport body 30 includes a rigid body. Therefore, the portion of thedisplay panel 10 to which thesupport body 30 is attached is less flexible than the portion thereof to which thesupport body 30 is not attached. There can be practical cases where the portion of thedisplay panel 10 to which thesupport body 30 is attached is substantially inflexible and the portion thereof to which thesupport body 30 is not attached is flexible. - Note that the
support body 30 may include, for example, a metal plate, a glass plate, a resin plate, or a ceramic plate. - Specifically, in the present embodiment, the
support body 30 includes afirst support body 31 and asecond support body 32. - The
first support body 31 and thesecond support body 32 are arranged in the x-axis direction and separated from each other by a distance. Thefirst support body 31 is attached to thedisplay panel 10 on one side of thereinforcement body 20 with respect to the x-axis direction. In contrast, thesecond support body 32 is attached to thedisplay panel 10 on the other side of thereinforcement body 20 with respect to the x-axis direction. Thereinforcement body 20 is attached to a portion of thedisplay panel 10 that is located between the portion of thedisplay panel 10 to which thefirst support body 31 is attached and the portion of thedisplay panel 10 to which thesecond support body 32 is attached. Both one side of thedisplay device 1 b with respect to the x-axis direction and the other side thereof are substantially inflexible, and the portion of thedisplay device 1 b in which thereinforcement body 20 is provided, in other words, the central portion of thedisplay device 1 b with respect to the x-axis direction, is flexible. - The
reinforcement body 20 is not necessarily provided across theentire display panel 10 and may be provided in a part of the display panel, as in the present embodiment. This provision of thereinforcement body 20 in at least a part of the flexible portion of thedisplay panel 10 enables improving the press resistance of the area in which thereinforcement body 20 is provided. -
FIG. 9 is a schematic plan view of aprotrusion 21B in accordance with Embodiment 3, illustrating the shape of theprotrusion 21B as it appears in a plan view. - Referring to
FIG. 9 , in the present embodiment where thefirst support body 31 and thesecond support body 32 are arranged in the x-axis direction, theprotrusion 21B preferably includes a plurality of first protrusions 21B1 reaching one end portion of theaccommodation space 21 a from the other end portion thereof with respect to the y-axis direction which is perpendicular to the x-axis direction. The provision of these first protrusions 21B1 enables efficiently restraining theaggregation layer 23 a and thesurface 21b 1 from being displaced relative to each other. Therefore, press resistance can be more efficiently restrained. - With a view to more efficiently restraining press resistance, it is preferable that the
protrusion 21B further includes a plurality of second protrusions 21B2 interconnecting those of the first protrusions 21B1 that are adjacent to each other in the x-axis direction and that those of the second protrusions 21B2 that are adjacent to each other in the x-axis direction are disposed in different locations with respect to the y-axis direction. -
FIG. 10 is a schematic cross-sectional view of adisplay device 1 c in accordance with Embodiment 4. - Embodiment 3 has discussed an example where the
display device 1 b includes twosupport bodies - Referring to
FIG. 10 , thedisplay device 1 c in accordance with Embodiment 4 includes threesupport bodies reinforcement body 20 is provided in at least a part of the portion of thedisplay panel 10 in which none of thesupport bodies display device 1 c can have excellent press resistance. -
FIG. 11 is a schematic plan view of aprotrusion 21B in accordance with Embodiment 5, illustrating the shape of theprotrusion 21B as it appears in a plan view.FIG. 12 is a schematic plan view of aprotrusion 21B in accordance with Embodiment 6, illustrating the shape of theprotrusion 21B as it appears in a plan view.FIG. 13 is a schematic plan view of aprotrusion 21B in accordance with Embodiment 7, illustrating the shape of theprotrusion 21B as it appears in a plan view. - The aforementioned embodiments have discussed one exemplary shape of protrusions. However, in the present invention, the protrusions do not necessarily have the shape described in the aforementioned embodiments.
- Referring to
FIG. 11 , theprotrusion 21B may be arranged, for example, in a lattice. In Embodiment 5 shown inFIG. 11 , theprotrusion 21B includes: a plurality of first protrusions 21B1 extending in the y-axis direction and arranged in the x-axis direction in an equidistant manner; and a plurality of second extending in the x-axis direction and arranged in the y-axis direction in an equidistant manner. The first protrusions 21B1 intersect with the second protrusions 21B2. - Note that the regions A are rectangular in the embodiment shown in
FIG. 11 , but may be, for example, hexagonal or otherwise polygonal, circular, elliptical, or elongated circular. - Referring to
FIG. 12 , theprotrusion 21B may be arranged, for example, in an oblique lattice. In Embodiment 6 shown inFIG. 12 , theprotrusion 21B includes a plurality of first protrusions 21B1 and a plurality of second protrusions 21B2 that are inclined to the x-axis direction and the y-axis direction respectively. The first protrusions 21B1 intersect with the second protrusions 21B2 (typically, at 90 degrees). - Referring to
FIG. 13 , theprotrusion 21B includes a matrix of dot-like protrusions 21B3. The protrusions 21B3 are arranged in an oblique matrix, but may be arranged in an upright matrix. - Even when the
protrusion 21B shaped as shown in, for example,FIGS. 11 to 13 is provided, the provision of theprotrusion 21B enables improving the press resistance of the display device. - The aforementioned embodiments have discussed examples where the
aggregation layer 23 a is formed when voltage is applied across thefirst electrode 24 a and thesecond electrode 24 b, and theparticles 23 are dispersed when no voltage is applied. - The aforementioned embodiments have additionally discussed examples where the
aggregation section 24 aggregates theparticles 23 when theaccommodation space 21 a is under applied voltage. However, in the present invention, theparticles 23 may be aggregated by any method. - For instance, a plurality of
particles 23 that are aggregated in a magnetic field may be dispersed in thedispersion medium 22, and theaggregation section 24 may include a member that applies a magnetic field to theaccommodation space 21 a (e.g., a coil). In such a case, theparticles 23 are preferably composed primarily of, for example, magnetic particles such as iron particles. - The
surface 21b 1 of the firstmain wall section 21 b may be irregular. When this is the case, anchoring effect is enhanced between thesurface 21 b 1 and theaggregation layer 23 a. That in turn enables further improving press resistance. - The aforementioned embodiments have discussed examples where the
protrusion 21B is provided on thesurface 21b 1 of the firstmain wall section 21 b on the side of theaccommodation space 21 a. However, in the present invention, the protrusion is not necessarily provided. In the present invention, no protrusion needs to be formed on the surface of the first main wall section on the side of the accommodation space. -
- 1, 1 a, 1 b, 1 c Display Device
- 10 Display Panel
- 10 c Flexible Section
- 20 Reinforcement Body
- 21 Reinforcement Main Body
- 21 a Accommodation Space
- 21 b First Main Wall Section
- 21B Protrusion
- 21B1 First Protrusion
- 21B2 Second Protrusion
- 21 c Second Main Wall Section
- 22 Dispersion Medium
- 23 Particle
- 23 a Aggregation Layer
- 24 Aggregation Section
- 24 a First Electrode
- 24 b Second Electrode
- 25 Power Supply
- 26 Control Section
- 30 Support Body
- 31 First Support Body
- 32 Second Support Body
Claims (16)
1. A display device comprising:
a display panel including in at least a part thereof a flexible section that is flexible; and
a reinforcement body attached to the flexible section, wherein
the reinforcement body includes:
a reinforcement main body that is flexible, the reinforcement main body having an accommodation space overlapping the flexible section;
a dispersion medium contained in the accommodation space;
a plurality of particles dispersed in the dispersion medium; and
an aggregation section that aggregates the plurality of particles so as to form an aggregation layer in the accommodation space.
2. The display device according to claim 1 , wherein the reinforcement body is structured such that the aggregation layer formed by the aggregation section reinforces the flexible section.
3. The display device according to claim 1 , wherein
the reinforcement main body includes:
a first wall section along the flexible section; and
a second wall section facing the first wall section with the accommodation space intervening therebetween, and
the first wall section has a protrusion on a surface thereof on a side of the accommodation space, the protrusion protruding toward the second wall section.
4. The display device according to claim 3 , wherein the protrusion is provided so as to divide a portion of the accommodation space on a side of the first wall section into a plurality of regions.
5. The display device according to claim 3 , wherein the protrusion has a height less than or equal to half of a thickness of the accommodation space when the flexible section is platelike.
6. The display device according to claim 3 , wherein the protrusion has a height greater than or equal to 10 times an average particle diameter of the plurality of particles.
7. The display device according to claim 4 , wherein the reinforcement body is structured so as to provide the aggregation layer in each of the plurality of regions.
8. The display device according to claim 1 , further comprising:
a first support body attached to the display panel on one side of the reinforcement body with respect to a first direction; and
a second support body attached to the display panel on another side of the reinforcement body with respect to the first direction.
9. The display device according to claim 8 , wherein the protrusion includes a plurality of first protrusions reaching one end portion of the accommodation space from another end portion thereof with respect to that is a second direction perpendicular to the first direction.
10. The display device according to claim 9 , wherein
the protrusion further includes a plurality of second protrusions interconnecting those of the plurality of first protrusions that are adjacent to each other in the first direction, and
those of the plurality of second protrusions that are adjacent to each other in the first direction are disposed in different locations with respect to the second direction.
11. The display device according to claim 9 , wherein the protrusion further includes a plurality of second protrusions extending in a direction that intersects with the plurality of first protrusions.
12. The display device according to claim 1 , wherein
the plurality of particles are charged particles, and
the aggregation section includes:
a first electrode and a second electrode facing each other with the accommodation space intervening therebetween; and
a power supply that applies voltage across the first electrode and the second electrode.
13. The display device according to claim 12 , wherein
the aggregation section further includes a control section that controls the voltage that the power supply applies across the first electrode and the second electrode, and
the control section is capable of applying different levels of voltage across the first electrode and the second electrode.
14. The display device according to claim 13 , wherein the control section is capable of linearly controlling the voltage applied across the first electrode and the second electrode.
15. The display device according to claim 1 , wherein the charged particles include at least one of titanium oxide particles, carbon black-particles, polyethylene particles, polystyrene particles, and silica particles.
16. The display device according to claim 1 , wherein the dispersion medium contains at least one of silicone oil, water, ethylene glycol, propylene glycol, and decane.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2020/001005 WO2021144873A1 (en) | 2020-01-15 | 2020-01-15 | Display device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20230032985A1 true US20230032985A1 (en) | 2023-02-02 |
Family
ID=76863945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/789,341 Pending US20230032985A1 (en) | 2020-01-15 | 2020-01-15 | Display device |
Country Status (3)
Country | Link |
---|---|
US (1) | US20230032985A1 (en) |
CN (1) | CN114930434B (en) |
WO (1) | WO2021144873A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9733671B2 (en) * | 2014-02-05 | 2017-08-15 | Samsung Display Co., Ltd. | Flexible display apparatus |
US20190187752A1 (en) * | 2017-12-14 | 2019-06-20 | Lg Display Co., Ltd. | Backplate and Foldable Display Device Including the Same |
US10416724B2 (en) * | 2015-12-29 | 2019-09-17 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Foldable terminal |
US20190286195A1 (en) * | 2016-07-08 | 2019-09-19 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Support structure for supporting flexible display screen, and flexible display screen module |
US10534400B2 (en) * | 2018-05-24 | 2020-01-14 | Innolux Corporation | Foldable electronic device |
US20230045043A1 (en) * | 2020-04-20 | 2023-02-09 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Terminal device and folding display screen thereof |
US11880241B2 (en) * | 2019-10-31 | 2024-01-23 | Yungu (Gu'an) Technology Co., Ltd. | Flexible display panel and flexible display apparatus |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8513883B2 (en) * | 2008-12-31 | 2013-08-20 | Nokia Corporation | Electroluminescent device having piezoelectric component |
TW201110802A (en) * | 2009-06-24 | 2011-03-16 | Seiko Epson Corp | Electro-optical device, electronic device, and illumination apparatus |
JP2012226099A (en) * | 2011-04-19 | 2012-11-15 | Seiko Epson Corp | Display sheet, display sheet manufacturing method, display device and electronic apparatus |
JP6032727B2 (en) * | 2012-03-01 | 2016-11-30 | 国立大学法人金沢大学 | Magnetic particle composite viscoelastic body and variable stiffness type dynamic vibration absorber using the same |
CN110134271A (en) * | 2013-12-02 | 2019-08-16 | 株式会社半导体能源研究所 | Electronic device |
JP6253541B2 (en) * | 2014-07-30 | 2017-12-27 | 株式会社ジャパンディスプレイ | Display device |
KR102088674B1 (en) * | 2014-11-27 | 2020-03-13 | 삼성전자주식회사 | flexible display device |
JP6431984B2 (en) * | 2015-07-27 | 2018-11-28 | 富士フイルム株式会社 | Electroacoustic transducer film and method for producing the same, electroacoustic transducer, flexible display, vocal cord microphone, and sensor for musical instrument |
US10268238B2 (en) * | 2017-06-08 | 2019-04-23 | Google Llc | Foldable display neutral axis management with thin, high modulus layers |
CN109300405A (en) * | 2018-11-30 | 2019-02-01 | 云谷(固安)科技有限公司 | A kind of display panel and device |
-
2020
- 2020-01-15 WO PCT/JP2020/001005 patent/WO2021144873A1/en active Application Filing
- 2020-01-15 US US17/789,341 patent/US20230032985A1/en active Pending
- 2020-01-15 CN CN202080090450.8A patent/CN114930434B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9733671B2 (en) * | 2014-02-05 | 2017-08-15 | Samsung Display Co., Ltd. | Flexible display apparatus |
US10416724B2 (en) * | 2015-12-29 | 2019-09-17 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Foldable terminal |
US20190286195A1 (en) * | 2016-07-08 | 2019-09-19 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Support structure for supporting flexible display screen, and flexible display screen module |
US20190187752A1 (en) * | 2017-12-14 | 2019-06-20 | Lg Display Co., Ltd. | Backplate and Foldable Display Device Including the Same |
US10534400B2 (en) * | 2018-05-24 | 2020-01-14 | Innolux Corporation | Foldable electronic device |
US11880241B2 (en) * | 2019-10-31 | 2024-01-23 | Yungu (Gu'an) Technology Co., Ltd. | Flexible display panel and flexible display apparatus |
US20230045043A1 (en) * | 2020-04-20 | 2023-02-09 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Terminal device and folding display screen thereof |
Also Published As
Publication number | Publication date |
---|---|
CN114930434A (en) | 2022-08-19 |
CN114930434B (en) | 2024-02-27 |
WO2021144873A1 (en) | 2021-07-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10211420B2 (en) | OLED display device | |
US10084155B2 (en) | OLED display | |
US7719185B2 (en) | Flat panel display and driving method using the same | |
US9303840B2 (en) | Display device | |
US20070057932A1 (en) | Flat panel display and organic light emitting display | |
US10700310B2 (en) | Display device and method of manufacturing the same | |
KR20190105537A (en) | Display device using micro led and manufacturing method thereof | |
US20110278557A1 (en) | Organic light emitting diode and light source device including the same | |
US7944606B2 (en) | Display device | |
KR20140013786A (en) | Wire grid type polarization structures, methods of manufacturing wire grid type polarization structures, and organic light emitting display devices having wire grid type polarization structures | |
US20210126222A1 (en) | Encapsulation structure, and display apparatus | |
US20230032985A1 (en) | Display device | |
CN109870841B (en) | Display device and method of manufacturing the same | |
CN104851906A (en) | Display substrate, manufacturing method thereof, driving method thereof and display device | |
CN1467786A (en) | Field emission display device | |
CN1266732C (en) | Field emission display device | |
US20210325726A1 (en) | Polarizer, display panel, and method for manufacturing display panel | |
US9923173B2 (en) | Optoelectronic component and method for producing an optoelectronic component | |
CN205609531U (en) | Organic light emitting diode display | |
KR101845362B1 (en) | Cell driven by electric field and the operation method thereof | |
CN110379761B (en) | Micro light-emitting diode transfer substrate and device | |
TW201502674A (en) | Electrochronmic film | |
KR20110074144A (en) | A electrophoretic light converting particle and electrophoretic display device having the same | |
WO2015105022A1 (en) | Organic electroluminescent device | |
US20240069399A1 (en) | Display device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SHARP KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SONODA, TOHRU;INUZUKA, MASAHIRO;SIGNING DATES FROM 20220520 TO 20220526;REEL/FRAME:060320/0154 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS |